| 範例 | 說明 | 詳細說明 | CSS版本 |
|---|---|---|---|
| * | any element | Universal selector | 2 |
| E | an element of type E | Type selector | 1 |
| E[foo] | an E element with a "foo" attribute | Attribute selectors | 2 |
| E[foo="bar"] | an E element whose "foo" attribute value is exactly equal to "bar" | Attribute selectors | 2 |
| E[foo~="bar"] | an E element whose "foo" attribute value is a list of space-separated values, one of which is exactly equal to "bar" | Attribute selectors | 2 |
| E[foo^="bar"] | an E element whose "foo" attribute value begins exactly with the string "bar" | Attribute selectors | 3 |
| E[foo$="bar"] | an E element whose "foo" attribute value ends exactly with the string "bar" | Attribute selectors | 3 |
| E[foo*="bar"] | an E element whose "foo" attribute value contains the substring "bar" | Attribute selectors | 3 |
| E[hreflang|="en"] | an E element whose "hreflang" attribute has a hyphen-separated list of values beginning (from the left) with "en" | Attribute selectors | 2 |
| E:root | an E element, root of the document | Structural pseudo-classes | 3 |
| E:nth-child(n) | an E element, the n-th child of its parent | Structural pseudo-classes | 3 |
| E:nth-last-child(n) | an E element, the n-th child of its parent, counting from the last one | Structural pseudo-classes | 3 |
| E:nth-of-type(n) | an E element, the n-th sibling of its type | Structural pseudo-classes | 3 |
| E:nth-last-of-type(n) | an E element, the n-th sibling of its type, counting from the last one | Structural pseudo-classes | 3 |
| E:first-child | an E element, first child of its parent | Structural pseudo-classes | 2 |
| E:last-child | an E element, last child of its parent | Structural pseudo-classes | 3 |
| E:first-of-type | an E element, first sibling of its type | Structural pseudo-classes | 3 |
| E:last-of-type | an E element, last sibling of its type | Structural pseudo-classes | 3 |
| E:only-child | an E element, only child of its parent | Structural pseudo-classes | 3 |
| E:only-of-type | an E element, only sibling of its type | Structural pseudo-classes | 3 |
| E:empty | an E element that has no children (including text nodes) | Structural pseudo-classes | 3 |
| E:link E:visited |
an E element being the source anchor of a hyperlink of which the target is not yet visited (:link) or already visited (:visited) | The link pseudo-classes | 1 |
| E:active E:hover E:focus |
an E element during certain user actions | The user action pseudo-classes | 1 and 2 |
| E:target | an E element being the target of the referring URI | The target pseudo-class | 3 |
| E:lang(fr) | an element of type E in language "fr" (the document language specifies how language is determined) | The :lang() pseudo-class | 2 |
| E:enabled E:disabled |
a user interface element E which is enabled or disabled | The UI element states pseudo-classes | 3 |
| E:checked | a user interface element E which is checked (for instance a radio-button or checkbox) | The UI element states pseudo-classes | 3 |
| E::first-line | the first formatted line of an E element | The ::first-line pseudo-element | 1 |
| E::first-letter | the first formatted letter of an E element | The ::first-letter pseudo-element | 1 |
| E::selection | the portion of an E element that is currently selected/highlighted by the user | The UI element fragments pseudo-elements | 3 |
| E::before | generated content before an E element | The ::before pseudo-element | 2 |
| E::after | generated content after an E element | The ::after pseudo-element | 2 |
| E.warning | an E element whose class is "warning" (the document language specifies how class is determined). | Class selectors | 1 |
| E#myid | an E element with ID equal to "myid". | ID selectors | 1 |
| E:not(s) | an E element that does not match simple selector s | Negation pseudo-class | 3 |
| E F | an F element descendant of an E element | Descendant combinator | 1 |
| E > F | an F element child of an E element | Child combinator | 2 |
| E + F | an F element immediately preceded by an E element | Adjacent sibling combinator | 2 |
| E ~ F | an F element preceded by an E element | General sibling combinator | 3 |